2007 - Audio comics made in cooperation with Ilegalni Poslasičari, an artistic/media group (Belgrade, Serbia), and performed live at Kornet book promotions in Serbia and Croatia.

Marko Kraljević - Natprirodni ciklus by Boris Starešina (Kornet, Beograd, 2006) is a cycle of surreal poems about the epic Serbian folk legend Marko Kraljević. One of the poems confronting Marko Kraljević with aliens was turned into an audio comic by Halbstar and Umbra starring Ivan Tobić and Bojana Đorđević.